[A]: Cocaine is an alkaloid derived from the shrub Cannabis sativa.
[R]: Cocaine is a derived form of LSD.

Options

A. If both A and R are true and R is the correct explanation of A
B. If both A and R are true but R is not the correct explanation of A
C. If A is true and R is false
D. If both A and R are false

Answer

### Step-by-Step Solution:

1. **Understanding the Assertion**: The assertion states that "Cocaine is an alkaloid derived from the shrub Cannabis sativa." We need to evaluate the accuracy of this statement.
- **Analysis**: Cocaine is not derived from Cannabis sativa; instead, it is derived from the Erythroxylum coca plant. Therefore, this assertion is **false**.

2. **Understanding the Reason**: The reason states that "Cocaine is a derived form of LSD." We need to evaluate the accuracy of this statement as well.
- **Analysis**: Cocaine and LSD (lysergic acid diethylamide) are two distinct substances. Cocaine is a stimulant, while LSD is a hallucinogen. They are not derived from one another, making this reason **false**.

3. **Conclusion**: Since both the assertion and the reason are false, we can conclude that the correct option is that both the assertion and the reason are false.

### Final Answer:
Both assertion and reason are false.